Redirecting the output in shell script

Question

I have a shell script.

Say in script test.sh below are thw two prcoess i launch through script

1.echo execute Test.sh start

2.java process1 > /dev/null

3.java process2 > /dev/null

4.echo execute Test.sh finish

5.exit

Now if i run test.sh, say process1 is running and process2 will kill the process1 based on certain condition, so when it kills the process 1, it outputs , this output i want to redirect.

Now output is execute Test.sh start

test.sh line :2 killed pid java process1 > /dev/null

execute Test.sh finish

I want it to look like below, so how to redirect it.

execute Test.sh start

execute Test.sh finish

I hope i am clear in my question framing now

Do you mean process1 will restart?

dimba
– dimba

2011-06-11 07:58:34 +00:00
Commented Jun 11, 2011 at 7:58 — dimba
– dimba, Commented Jun 11, 2011 at 7:58

Cem Kalyoncu · Accepted Answer · 2011-06-11 08:59:46Z

2

Have you considered redirecting error stream

java process1 > /dev/null 2> /dev/null

java process2 > /dev/null 2> /dev/null

EDIT:
I think you are asking how to redirect bash shell's output. Use the following:

bash > output.txt
java process1 > /dev/null
java process2 > /dev/null
exit

EDIT 2:
Seems like there is only one ugly way to do it, which may not satisfy your needs.

bash > output.txt
java process1 > output1
java process2 > output2
exit
cat output1
cat output2
rm output1 output2

EDIT 3:
It seems there can be another way. Try other shells which may not print out process number when it is killed.

edited Jun 11, 2011 at 8:59

answered Jun 11, 2011 at 7:57

Cem Kalyoncu

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2 Comments

Abhiram Kulkarni Over a year ago

the echo output has to come, only the killed output should not come, sohow to redirect this?

Abhiram Kulkarni Over a year ago

It was good answer, but this i cannot use because, the echo messages have to be shown on the shell console then and there only !!

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